#!/usr/bin/env python
'''
Author: Christopher Duffy
Date: February 2015
Name: nmap_scanner.py
Purpose: To scan a network

Copyright (c) 2015, Christopher Duffy All rights reserved.

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met: * Redistributions 
of source code must retain the above copyright notice, this list of conditions and 
the following disclaimer. * Redistributions in binary form must reproduce the above 
copyright notice, this list of conditions and the following disclaimer in the 
documentation and/or other materials provided with the distribution. * Neither the 
name of the nor the names of its contributors may be used to endorse or promote 
products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
DISCLAIMED. IN NO EVENT SHALL CHRISTOPHER DUFFY BE LIABLE FOR ANY DIRECT, INDIRECT, 
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''

import sys
try:
    import nmap
except:
    sys.exit("[!] Install the nmap library: pip install python-nmap")

# Argument Validator
if len(sys.argv) != 3:
    sys.exit("Please provide two arguments the first being the targets the second the ports")

ports = str(sys.argv[2])
addrs = str(sys.argv[1])

scanner = nmap.PortScanner()
scanner.scan(addrs, ports)
for host in scanner.all_hosts():
    if “” in host:
        print("The host's IP address is %s and it's hostname was not found") % (host, scanner[host].hostname())
    else:
        print("The host's IP address is %s and it's hostname is %s") % (host, scanner[host].hostname())

